speaking and interpreting and feelings

Tried something new recently in class as a prep for student presentations. I made them prepare short speeches, one the one hand in English and on the other hand in gibberish. I find that the teaching of gibberish has been neglected, and they were surprisingly, or not, bad at it. It's interesting how hard it is to say something in gibberish without recognisable words. I also asked them to convey emotions as they spoke and they were also complete rubbish at that. One guy was unable to convey the feeling 'anger'... So I'm going to introduce more drama and gibberish to my English classroom.